Heating arrangement for kilns and other structures



a. C. HEILMIAN.

HEATING ARRANGEMENT FOR KILNS AND OTHER STRUCTURES.

' APPLICA'HON FILED AUG.I3. 1919..

Reissued Oc 26, 1920. 14,972.

UNITED STATES PATENT OFFICE. a

GUY c. HEILMA1\T-,.0F1 PHILADELPHIA, PENNSYLVANIA HEATING ARRANGEMENT FOR KILNS .AND OTHER STRUCTURES. I

Specification of Reissued Letters Patent. Rei d O t 2 i 9 I I v I 9 v Original No. 1,237,036, dated August'14, 1917, Serial 1IOJ124,755, filed October 10, 1916. Application for reissue filed August 1 3,' 1919 Serial No. 317,391.

T 0 all whom it may concern: 1

Be it known that I, GUY C, HnIL ArI a citizen of the United States, residing in the city of Philadelphia, county of Philadeh phia, and State of Pennsylvania, have 111-. vented certain new and useful Improvef ments in Heating Arrangements for Kilns and other Structures, of which the followm is a specification.

ly invention relates to means for supplying combustion heat to brick-kilns and other structures requiring furnaces or heat ing arrangements, and has for its object to provide improved means for the thorough 15 mixing and combining or combustion of fuel and air, and for discharging the heat ed products of combustion into the structure, or into the chamber to be heated, in such a way as to secure an even distribution of the heat. When applied to a brick-kiln, my invention will cause the heated products of combustion to be brought in contact with the green bricks in such a manner as to burn the same expeditiously and uniformly, without the usual smoke and dust.

In carryin out my invention, in its preferred form, l provide a novel arrangement of fuel and air passages, to cause the air to be heated before it is brought in contact with the fuel, and to obtain an efficient combustion of the mixture.

brick-kiln; Fig. 2 is partly a side elevation of the kiln and partly a vertical section on the line 2-2 of Fig. 1, Fig. 2 therefore being a view taken at right angles to Fig. 1; I Fig. 3 is a partial horizontal section of certain details; and Fig. 4 is a vertical section showing, upon anenlarged scale, someof the parts appearlng 1n 1g. 1.

to limit myself to the specific details shown in this example, and that various modifica tions may be'made without departingfrom bricks 3, which are stacked loosely to provide spaces for the passage of the hot gases,

from one side of the chamber to the other,

the spacing of the bricksat such arches being such that the hot'gases admitted into said arches as described below, will be able to pass laterally and upwardly into. and through the stack of bricks. The green bricks are preferably stacked in such a manner asto produce arches 1 at regular int'ervals,'see F ig. 2. Conduits 5 conveying fuel gas are provided on opposite sides, of the kiln and areconnected with the interior thereof, that is to say, with the kiln chamher, by branches or passages 6, which in the particular construction shown areangular, each ofthem comprising a section extending upwardly from the fuel conduit or fuel maln 5, and a horizontal section extending from the upper end of said vertical or upward section through the bottom portion of the adjacent wall l'so as to communicate with the kiln chamber, at one of the arches t provided in the stacked bricks 3; that is to say, in stacking the bricks, the arches tare formed at points in registry with the dis charge ends of the passages 6, it being understood that such discharge ends are ar ranged in pairs, in longitudinal registry at opposite sides ofthe kiln chamber, so that one passage 6 of a pair will discharge into oneend of an arch a, whilethe other passage 6 of the same'pair will discharge into the opposite ends of the same arch 4. The flow of fuel gas from the conduits 5 through the passages 6 is regulated by valves 7, and access is provided to said passages, and es. pecially to the horizontal sections thereof, by doors 8 which permit inspection and cleaningreadi'ly, For reasons set forth fully hereinafter, I prefer to make the passages 6 tapering or contracted toward their outlets or discharge It will be understood that I do not desire Within the respective wall 1, such portion is not straight, but angular, the passage 11, in the particular construction illustrated best by Fig. 3, extending first inwardly,

then laterally, and finally forwardly to the outlet or nozzle llby means of which said passage communicates with the fuel passage. It will be noted that the nozzle 11 enters the fuel passage 6, or communicates therewith, at the contracting discharge portion 6', and furthermore, that the nozzle is V disposed obliquely, so as to discharge air into the fuel passage toward the outlet thereof. It will -be understood that the air is heated as it travels through the portion of the passage 11 which is located within the wall 1, since 'thelatter is heated by the combustion products passing through the discharge portions of the passages 6 and through the chamber of the kiln. The air is thus heated beforeit comes in contact with the fuel gas in the inner portionsof the passages 6, said inner portions forming combustion chambers. A blower l3 supplies air to the conduits 10 at the desired pressure.

The contraction of the fuel passage at its discharge portion 6' will cause a checking orretarding of the flow in-said tapered or contracted'portion 6, thus giving the fuel gas and the air a betteropportunity to mix and burn thoroughly between the nozzle 11 and the discharge orifice of the respective passage 6, 6'. This action is fur- .ther enhanced by the oblique direction of the nozzle 11', which causes the heated air to produce asort of whirling action in the combustion chamber proper, and the best tically none.

through the properly spaced bricks, which that it is located at the junction of the verresults are obtained when, as shown, the oblique air-nozzle 11 communicates with the fuel passage at the tapering or gradually-contracting portion thereof, to assist the proper flow of air and gas toward the discharge orifice and into the arch 4, and the thorough mixing and-combustion within th passages 6, 6., so that there is no. flame within the main kiln chamber, or prac-.

The products of combustion entering the arches 4 through the orifices at the inner ends of the passages 6, 6 flow through said arches, from which they are disseminated laterally and upwardly are heated uniformly and expeditiously thereby, without the smoke and waste attending usual brickburning operations.

As regards the valve 7, it will benoted tical or upward section of the fuel passage (iwith the horizontal section of said passage, while the door 8 is located at the outer-end of said horizontal section thus it is possible 't'oshut the valve 7 offiany one of said'passages and then open the door 8 to obtain access to the upper or horizontal section of such passage without risking an escape of fuel gas from the upper end of the upward.

or vertical section of the passage, which section remains in communication with the respective fuel-gas conduit 5; the valve stem does not form a sufficient obstruction to prevent inspection or cleaning of the horizontal section when the door 8 is open.

Peep-holes '14 are formed in the walls 1 above the passages 6, expanding from the outside. inwardly, said peep-holes being located' adjacent to the respective passages 6 and providing means for viewing the spaces within the arches 4, the outer ends of said holes being covered by transparent covers 15., SuchaS plates of mica.

It will be understood that, corresponding to the arrangement of the stacked bricks 3 in such a manner as to place the arches 4: at regular intervals, I prefer ,to space the fuelgas passages 6, 6' evenly, as well as the peepholes 14 and the air-passages 11, as will be seen by reference to Figs. 2 and 3.- I

I claim as my invention:

1. A kiln or other structure having walls forminga heating chamber, a fuel conduit extending through a wall aforesaid and dischargingfinto said chamber, an air conduit communicating with said fuel conduit within said wall thereby producing a mixture of air and fuel within said wall, and an arch into and through which the heated products of combustion flow.

"2. A in or other structure having walls forming a heating chamber, a plurality of spaced fuel passages extending through, a wall aforesaid to said chamber a plurality of air passages extending, through said wall tothe respective fuel passages, thereby producing a mixture of'alr heated by said wall an'do'f fuel inthe first-named passages, and arches. into and through which the heated products of combustion flow.

3. A kiln or other structure having walls a forming a heating chamber, a fuel conduit having a plurality of passages extending through. a Wall aforesaid to said chamber, valves "for [controlling the flow of fuel through said passages and doors for permittin access to said passages, in combination with an air conduit having a plurality passage. a 7

5. kiln or other structure having walls forming a heating chamber, a transverse fuel conduit extending through a wall aforesaid and discharging into said chamher, and an air conduit communicating with said fuel conduit within said wall at a point between the ends of said transverse conduit, thereby producing a mixture of air and fuel within said wall.

6. A kiln or other structure having walls forming a heating chamber, a plurality of spaced transverse fuel passages extending through a wall aforesaid to said chamber, and a plurality of .air passages extending into said wall and communicating with the respective fuel passages at points within said wall exteriorly of the inner ends of said transverse fuel passages, thereby producing a mixture of air heated by said wall and of fuel in the first-named passages.

7. In a heating arrangement for kilns and other structures, a fuel passage having a discharge end at an angle to the vertica and a portion tapering toward the discharge end of the passage, and an air passage arranged to discharge air into said tapered portion at a distance from the discharge end of the fuel passage, whereby air and fuel will be caused to mix before reaching the discharge end of the fuel passage.

8. In a heating arrangement for kilns and other structures, a fuel passage having a discharge outlet directed at an angle to the vertical, and an air passage discharging into the side of said fuel passage at a distance from said outlet, said fuel passage having, between'its outlet and the discharge end of the air passage, a portion tapering toward said outlet.

9. In a heating arrangement for kilns and other structures, a fuel passage having a portion tapering toward the outlet, and an air passage having a discharge end disposed obliquely and communicating with said fuel passage at said tapering portion thereof.

10. In a heating arrangement for kilns and other structures, a fuel passage having an outlet, and an air passage having a discharge end ranging obllquely and lengthwise of the fuel passage and communicating therewith at a distance from the outlet of said fuel passage.

11. In a heating arrangement for kilns and other structures, a heated wall, a transverse fuel passage, and an air passage of varying direction extending within said wall and communicating with said trans verse fuel passage at a point exteriorly of the inner end of said passage.

12. In a heating device, a fuel conduit of gradually-varying cross section, and an airsupply passage discharging obliquely through the wall of said conduit toward the outlet of such conduit.

13. In a heating device, a fuel conduit having a wall oblique with reference to the axis of said conduit, and an air-supply passage discharging obliquely through such oblique wall toward the outlet of such conduit.

sage at a point between its outlet end and the junction of its two sections.

1 15. In a heating arrangement for kilns and other structures, a heated wall, passages for supplying a heatin medium, arches into which said passages ischarge, and peepholes extending through said wall adjacent to the respective passages, said peep-holes expanding from the outside inwardlyto afford a greater field of vision, and each peephole opening into the same arch as the adjacent passage.

I In testimony whereof I have signed this specification. GUY C. HEILMAN. 

